急等高手解答 Swing JTextPane 的Style问题！！

franksinger 2007-11-02 05:31:46
写了个小程序，就一个类，代码如下：
现在遇到个很困惑的问题，查找到要高亮显示的词后，清空jpane，再次输入的时候有时候会改变style，全部成了需要高亮显示的style。该如何解决？如何重置style？急等！

谢谢！！！！！！

public class TextCheckerV1 extends JFrame implements MouseListener {
private JMenuBar bar = null;
private JMenu clearMenu = null;
private JMenu exitMenu = null;
private JMenu checkMenu = null;
private JMenu fileMenu = null;
private String strText = null;
private JTextPane pane = null;
private DefaultStyledDocument doc = null;
private StyleContext sc = null;

private Style defaultStyle = null;
private Style frankStyle = null;

List <String > chars = null;

public TextCheckerV1() {
this.sc = new StyleContext();
this.doc = new DefaultStyledDocument(sc);
this.pane = new JTextPane(doc);

defaultStyle = sc.getStyle(StyleContext.DEFAULT_STYLE);
frankStyle = sc.addStyle( "FrankStyle ", defaultStyle);
StyleConstants.setForeground(frankStyle, Color.red);
StyleConstants.setBackground(frankStyle, Color.yellow);
StyleConstants.setLeftIndent(frankStyle, 8);
StyleConstants.setRightIndent(frankStyle, 8);
StyleConstants.setFirstLineIndent(frankStyle, 8);
StyleConstants.setFontFamily(frankStyle, "Arial ");
StyleConstants.setFontSize(frankStyle, 12);

bar = new JMenuBar();
this.setJMenuBar(bar);

fileMenu = new JMenu( "About ");
fileMenu.setMnemonic( 'A ');

checkMenu = new JMenu( "Check ");
checkMenu.setMnemonic( 'C ');

clearMenu = new JMenu( "Clear ");
clearMenu.setMnemonic( 'R ');

exitMenu = new JMenu( "Exit ");
exitMenu.setMnemonic( 'E ');

fileMenu.addMouseListener(this);
checkMenu.addMouseListener(this);
clearMenu.addMouseListener(this);
exitMenu.addMouseListener(this);

bar.add(fileMenu);
bar.add(checkMenu);
bar.add(clearMenu);
bar.add(exitMenu);

this.getContentPane().add(new JScrollPane(pane));
this.setSize(600, 500);
this.setTitle( "Text Checker (ver 1.0) ");
this.setLocation(200, 300);
this.setVisible(true);
}

public void mouseClicked(MouseEvent e) {
if (e.getSource() == exitMenu) {
exitSys();
} else if (e.getSource() == clearMenu) {
clearText(this.pane, this.doc);
} else if (e.getSource() == checkMenu) {
checkText(this.pane);
} else if (e.getSource() == fileMenu) {
showFile();
}
}

public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub

}

public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub

}

public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub

}

public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub

}

public void exitSys() {
dispose();
System.exit(0);
}

public void showFile() {
JOptionPane.showMessageDialog(this,
"version 1.0\nauthor: franksinger ",
"test ", 1);
}

public void clearText(JTextPane jpane, DefaultStyledDocument ddoc) {
if (jpane.getText() != null && (!jpane.getText().equals( " "))) {
jpane.setText( " ");
}

jpane.setEditable(true);
jpane.requestFocus();
}

public void checkText(JTextPane jpane) {
if (jpane.getText() == null ¦ ¦ jpane.getText().equals( " ")) {
return;
} else {
strText = getText(pane.getText());

if (jpane.getText() != null && (!jpane.getText().equals( " "))) {
try {
chars = getCharArray();

for (int n = 0; n < chars.size(); n++) {
int charLen = chars.get(n).length();
for (int j = 0; j < strText.length() - (charLen - 1); j++) {
String ch = strText.substring(j, j + charLen);

if (chars.get(n).compareTo(ch) == 0) {
try {
doc.setCharacterAttributes(j, charLen,
frankStyle, false);
} catch (Exception ble) { // BadLocationException
System.out
.println( "Exception happens while highlighting! ");
ble.printStackTrace();
}
}
}
}
} catch (Exception e) { // BadLocationException
// System.out.println( "Exception happens while
// highlighting! ");
System.out.println(e.getMessage());
e.printStackTrace();
}
}
jpane.setEditable(false);
}
}

public List <String > getCharArray() {
ArrayList <String > charArray = new ArrayList <String >();
charArray.add( "color ");
charArray.add( "labor ");
charArray.add( "maximize ");
charArray.add( "minimize ");
charArray.add( "prioritize ");
charArray.add( "specialized ");
charArray.add( "customize ");
charArray.add( "theater ");
charArray.add( "analyzes ");
charArray.add( "optimize ");
charArray.add( "favor ");
charArray.add( "zation ");
charArray.add( "utilize ");
charArray.add( "center ");
charArray.add( "program ");
charArray.add( "organize ");
return charArray;
}

public String getText(String str) {
String strNew = str.replaceAll( "[\n] ", " ").toLowerCase();
return strNew;
}

public static void main(String[] args) {
TextCheckerV1 myTest = new TextCheckerV1();
}
}

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stlizhao 2008-05-19
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把attr设置成局部变量,在用它的地方调用,这样就不会全部改变了.
IamHades 2008-02-03
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package com.enrising.swing;



import java.awt.Color;

import java.awt.event.ActionEvent;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;



import javax.swing.AbstractAction;

import javax.swing.ActionMap;

import javax.swing.GroupLayout;

import javax.swing.InputMap;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.KeyStroke;

import javax.swing.LayoutStyle;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.WindowConstants;

import javax.swing.GroupLayout.ParallelGroup;

import javax.swing.GroupLayout.SequentialGroup;

import javax.swing.event.DocumentEvent;

import javax.swing.event.DocumentListener;

import javax.swing.text.BadLocationException;

import javax.swing.text.DefaultHighlighter;

import javax.swing.text.Highlighter;



public class TextFieldDemo extends JFrame implements DocumentListener {



	private JTextField entry;

	private JLabel jLabel1;

	private JScrollPane jScrollPane1;

	private JLabel status;

	private JTextArea textArea;



	final static Color HILIT_COLOR = Color.RED/*Color.LIGHT_GRAY*/;

	final static Color ERROR_COLOR = Color.PINK;

	final static String CANCEL_ACTION = "cancel-search";



	final Color entryBg;

	final Highlighter hilit;

	final Highlighter.HighlightPainter painter;



	public TextFieldDemo() {

		initComponents();



		InputStream in = getClass().getResourceAsStream("content.txt");

		try {

			textArea.read(new InputStreamReader(in), null);

		} catch (IOException e) {

			e.printStackTrace();

		}



		hilit = new DefaultHighlighter();

		painter = new DefaultHighlighter.DefaultHighlightPainter(HILIT_COLOR);

		textArea.setHighlighter(hilit);



		entryBg = entry.getBackground();

		entry.getDocument().addDocumentListener(this);



		InputMap im = entry.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);

		ActionMap am = entry.getActionMap();

		im.put(KeyStroke.getKeyStroke("ESCAPE"), CANCEL_ACTION);

		am.put(CANCEL_ACTION, new CancelAction());

	}



	/**

	 * This method is called from within the constructor to initialize the form.

	 */



	private void initComponents() {

		entry = new JTextField();

		textArea = new JTextArea();

		status = new JLabel();

		jLabel1 = new JLabel();



		setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

		setTitle("TextFieldDemo");



		textArea.setColumns(20);

		textArea.setLineWrap(true);

		textArea.setRows(5);

		textArea.setWrapStyleWord(true);

		textArea.setEditable(false);

		jScrollPane1 = new JScrollPane(textArea);



		jLabel1.setText("Enter text to search:");



		GroupLayout layout = new GroupLayout(getContentPane());

		getContentPane().setLayout(layout);



		// Create a parallel group for the horizontal axis

		ParallelGroup hGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);



		// Create a sequential and a parallel groups

		SequentialGroup h1 = layout.createSequentialGroup();

		ParallelGroup h2 = layout.createParallelGroup(GroupLayout.Alignment.TRAILING);



		// Add a container gap to the sequential group h1

		h1.addContainerGap();



		// Add a scroll pane and a label to the parallel group h2

		h2.addComponent(jScrollPane1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);

		h2.addComponent(status, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);



		// Create a sequential group h3

		SequentialGroup h3 = layout.createSequentialGroup();

		h3.addComponent(jLabel1);

		h3.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED);

		h3.addComponent(entry, GroupLayout.DEFAULT_SIZE, 321, Short.MAX_VALUE);



		// Add the group h3 to the group h2

		h2.addGroup(h3);

		// Add the group h2 to the group h1

		h1.addGroup(h2);



		h1.addContainerGap();



		// Add the group h1 to the hGroup

		hGroup.addGroup(GroupLayout.Alignment.TRAILING, h1);

		// Create the horizontal group

		layout.setHorizontalGroup(hGroup);



		// Create a parallel group for the vertical axis

		ParallelGroup vGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);

		// Create a sequential group v1

		SequentialGroup v1 = layout.createSequentialGroup();

		// Add a container gap to the sequential group v1

		v1.addContainerGap();

		// Create a parallel group v2

		ParallelGroup v2 = layout.createParallelGroup(GroupLayout.Alignment.BASELINE);

		v2.addComponent(jLabel1);

		v2.addComponent(entry, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE);

		// Add the group v2 tp the group v1

		v1.addGroup(v2);

		v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);

		v1.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 233, Short.MAX_VALUE);

		v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);

		v1.addComponent(status);

		v1.addContainerGap();



		// Add the group v1 to the group vGroup

		vGroup.addGroup(v1);

		// Create the vertical group

		layout.setVerticalGroup(vGroup);

		pack();

	}



	public void search() {

		hilit.removeAllHighlights();



		String s = entry.getText();

		if (s.length() <= 0) {

			message("Nothing to search");

			return;

		}



		String content = textArea.getText();

		int index = content.indexOf(s, 0);

		if (index >= 0) { // match found

			try {

				int end = index + s.length();

				hilit.addHighlight(index, end, painter);

				textArea.setCaretPosition(end);

				entry.setBackground(entryBg);

				message("'" + s + "' found. Press ESC to end search");

			} catch (BadLocationException e) {

				e.printStackTrace();

			}

		} else {

			entry.setBackground(ERROR_COLOR);

			message("'" + s + "' not found. Press ESC to start a new search");

		}

	}



	void message(String msg) {

		status.setText(msg);

	}



	// DocumentListener methods



	public void insertUpdate(DocumentEvent ev) {

		search();

	}



	public void removeUpdate(DocumentEvent ev) {

		search();

	}



	public void changedUpdate(DocumentEvent ev) {

	}



	class CancelAction extends AbstractAction {

		public void actionPerformed(ActionEvent ev) {

			hilit.removeAllHighlights();

			entry.setText("");

			entry.setBackground(entryBg);

		}

	}



	public static void main(String args[]) {

		// Schedule a job for the event dispatch thread:

		// creating and showing this application's GUI.

		SwingUtilities.invokeLater(new Runnable() {

			public void run() {

				// Turn off metal's use of bold fonts

				UIManager.put("swing.boldMetal", Boolean.FALSE);

				new TextFieldDemo().setVisible(true);

			}

		});

	}



}


看看我这个例子，有关高亮显示问题的，也许能帮助你解决问题。
zhoche2008 2007-11-09
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http://bbs.bc-cn.net/dispbbs.asp?boardid=12&replyid=241077&id=127125&page=1&skin=0&star=1
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